Bit and drill guide



F. PYRON.

Bn AND DRILL GUIDE.

- APPLICATION FlLED MAY 14, 1920. 1,385,227.

Patented July 19, 1921.

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llllmllllli 26 @wwf/@wan ATTURIVEYS F. PYRON. BITAND DRILL GUIDE.APPucATloN mso MMM. 1920.

Patented July 19, 1921.

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nvm/mf? @HHK Pyewy l BY W/T/VESSES PATENT OFFICE.

FRANK PYRON, OF NEW YORK, N. Y.

BIT AND DRILL GUIDE.

Application filed May 14, 1920.

To all whom t may concern:

Be it known that l, FRANK FYnoN, a citizen of Italy, and a resident ot'.the city of New York borough ot Manhattan, in the county and State ofNew York, have invented a new and ImprovedBit and Drill Guide, of whichthe following is a iull, clear, and exact description. n

This invention relates to drill. and bit guides, and has reference moreparticularly to drill and bit guides adapted for cutting mortises .torthe purpose of installing locks.

An object of this invention is to provide a device l'or quickly andeasily cutting a mortise for installing a door lock.

Reference is to be had to the accompanying drawing forming a part oit'this specilication in which it is understood that the drawingillustrates only one foi-1n of the invention, and in which-n Figure 1 isan elevation of the guide in operation with parts broken away todisclose the method of operation.

Fig. 2 is a sectional view through `the device on the line 2-2 of Fig.1.

Fig. 3 is a sectional view through the device on the line 3-3 of Fig. 1.

Fig. 4 is a sectional rear View of the guide on the line 44 of Fig. 1. t

Fig. 5 is a fragmentary view of the bit guide in an open position. Fig.6 is a sectional view through the bit guide on the line 6-6 of Fig. 1:

i Referring to the accompanying drawing bv numerals, 1() indicates apiece of material in which it .is desired to make a Inoitise, such as :idoor or window, said mortise being for the purpose of' installing a lockor other dcvice. A U-shaped clamp 11 is provided with a clamping cleat12 on one leg 13 which is adapted to engage one face ot .the door 10. Aclamping screw 14 isl received by the other leg 150i the clamp 11 andsaid claniping screw is provided onone end with a head 16 which engagesa cleat 17 adapted to encrage the surface of the door. 10 opposite thecleat 12 when the clamping screw 14 is tightened against said door bymeans of a handle 18 on the end of said screw opposite the head 16. Theconnecting har 19 et the clamp 11 is provided with beveled edges 20which areI slidably received by a Specification of Letters Patent.

Patented July 19, 1921.

serial No. 381,361.

similarly shaped groove 21 in an adjusting plate 22. A rectangularlyshaped recess 23 is formed in the connecting bar 19, and a lug 24 isiornied on the adjusting bar 22 so as to be positioned in said recess23. An adjusting screw 5 is rotatably mounted longitudinally of theconnecting bar 19, said adjusting screw also passing through the lug 24so thatv when the screw 25 is rotated by means ot a knurled adjustinghead 26, the adjusting bar 22 will be moved longitudi- .nally of theconnecting liar 19. The screw 25 is restrained from Vmoving axially by ashoulder 27 engaging the edge of the recess 23, and a shoulder 2Sadjacent the adjusting head 26. Thus the adjusting har 22 may bepositioned centrally with respect to the edge of the door 10 or may beadjusted to any other desired position by rotating the screw 25 by theadjusting head 26. A groove 29 is formed longitudinally in the surfaceof the adjusting bar 22 opposite the lug 24, and a rack bar 30 isslidably mounted in said groove 29 so as to be positioned parallel tothe edge of the door 10. A plate 31 is secured to the face of the bar 22by screws 32 so that the rack bar 30 will he maintained in position inthe groovel 29. A rectangular opening 33 is provided in the rack bar 30,and rack teeth 34 are formed in one side of the rack bar 3() adjacentthe opening 33. A spindle 35 is rotatably mounted in the adjusting har22 and a pin ion 36 is secured to said spindle so that its teeth engagethe rack teeth 34. A knurled adjusting head 37 is secured to the outerend of the spindle 35 by a pin 38 so that when said adjusting head 37 ismanually rotated the pinion 36 will cause the rack har 30 to nuove`longitudinally in the recess 29.

A ratchet 39 is secured to the spindle between the adjusting head 37 andthe plate 31 and a pawl 4() is pivotally mounted on a pivot screw 41v sothat said pawl will engage the teeth of the ratchet 39, said pawl beingresiliently pressed against said teeth by a flat spring 42 secured to astud 43. A stud 44 is secured to they outer arm oi? the pawl 40 so thatsaid pawl may be moved about its pivot to the position shown in dottedlines in Fig.v 4, thus being disengaged from the 4l0 into which a lockmay ratchet 39. When in this latter position a flat surface 45 on thepawl 4() engages the spring 42 thus maintaining said pawl in saiddisengaged position. W hen the pawl 40 en` gages the teeth of theratchet 39, the rack bar 30 may be moved any desired number of teeth onthe ratchet 89 by rotating the adjusting head 87 but said pawl 40 willprevent the rack bar 30 from moving downwardly due to the pressure ofthe bit guide to be hereinafter described.

guide support 46 is provided with a forked end 47 which is secured tothe upper end of the rack bar 30 by a rivet 48. A tray 49 is secured tothe upper end of the support 46, said tray being preferably arcuate incross section on the upper surface so. as to receive a bit guide`50which is cylindrical in cross section. Approximately one-half of the bitguide 50 is hinged by means of a pin 51 so as to form a gate 52 whichmay be opened as shown in F ig. 5, so that the shank 53 of a bit 54 maybe inserted in said bit guide 50. A split sleeve 52L1 has an insidediameter approximately that of the outside diameter of the bit guide 50and the gate and said sleeve serves to maintain 'the gate 52 in a closedposition about the ank A pair of bushings are secured in the bit guide50 serving to position the shank 53 so that the bit 54 will be incontact with an extension guide 55 formed on the bit guide 50. A.longitudinal slot 55 is formed in the bit guide 50 and extension guide55, which is adapted to receive a shoulder 57 formed in the uppersurface of the tray 49. The shank 53 of the bit 54 is usually providedwith a square head 57 which is received by a bra-ce not shown, so thatsaid bit may be rotated by said brace, thus drilling a hole in the edgeof the door be inserted. In operation a hole 1s bored in the edge of thedoor l0 by rotatingthe bit by f means of the brace not shown. Theadineting head 37 is then rotated so that the pawl 40 passes one or moreteeth of the ratchet 89, which causes the bit 54 to be elevated apredetermined distance. second hole is now bored by moving the bit guide50 and the extension guide 55 inwardly on the tray and rotating said bit54 by the brace. This operation is repeated the desired number of timesso that the mortise 58 is formed in the edge of the door l0, which is ofsuch size as to .fit the lock to be inserted. lJVhen the adjusting' head37 is rotated, the pinion 3G engages the rack: teeth 34 so as to causethe upward movement of the rack bar 30 in the recess 29. lVhen it isdesired to move the rack bar 30 downwardly, the pawl 40 is raised to theposition shown in dotted lines in F ig. 4 by the stud 44 so that saidpawl is disengaged from the ratchet 39, thus allowing` the rack bar 30to be pushed downwardly in the recess of the :ulpisting bar 22 29. Theposition Y is adjusted relative to the edge of the door l0 by rotatingthe adjusting head 25 secured to the screw 25. The clamp ll is securedto the door by tightening the clamping screw 14 by the handle 18.

l would state in conclusion that while the illustrated exampleconstitutes a practical embodiment of my invention, l do not limitmyself strictly to the mechanical details herein illustrated, sincemanifestly the same can be considerably varied without departure fromthe lspirit of the invention as defined in the appended claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

l. A device for drillingmortises in doors, which comprises a clamp to beattached to the door, a drill bit support attached to the clamp, meansfor moving the support in one direction relative to the clamp, and meansfor moving 'the support in another direction relative to the clamp.

2. A device for drilling mortises in doors, which comprises a clamp forthe door, a` drill bit support attached to the clamp and disposedlongitudinally along the edge o the door in which the mortise is to beformed, means for movinglthe support Iongitiulinally of the door face,and means AI'or moving` the support laterally thereof.

8. A device for drilling mortises in doors, which comprises a clampadapted to grip a door adjacent the edge in, which the more tise is tobe formed, a body portion on said clamp extending across the front ofthe edge to be operated upon, a drill bit lsupport. a holder .for saidsupport adjustably attached to said clamp, a pinion on said holder, arack on said support adapted to cooperate with the pinion whereby themovement of the pinion will caus\l the movement of the support withrespect to the face o'' the door.

4. A device for drilling mortises in doors. which crnnprises clampadaljited to grip the edges of the door adjacent the face to be operatedupon. a body portion ou said clamp extending across the front of theface to be operated upon, a. drill bit support disposed longitudinallyalong` the face to be treated, a holder for said support :uljustably,Yengzrging said clamp, a threaded shaft on the clamp, and, a lug on theholder ein operating with the threaded shaft, tbe n'iovenient of thethreaded shaft adapted to causo lateral adjustable movement of theholder and the support with respect to the door face.

5. device for drilling mortises in doors, which comprises a clampadapted to grip the face of the door adjacent the edge to be treated, adrill bit support disposed along the face to be treated and spacedtherefrom, ed shaft disposed on the clamp laterally a holder for saidsupport laterally adjnstwith respect to the dom` face, und a lug on`nlole with respect to and coperating with the holdel` coperating withthe threaded 10 the clamp, a pinion on said holder, e mok shaft topermit lateral adjustment 0f the 5 on said support cooperating with thepinion holder with respect to the door fece.

for the longitudinal adjustment of the support with respect to the doorface, e; thrend- FRANK PYRON.

